Fig. 3.

Empirical discrimination powers for three methods: backward deletion with either AIC or BIC, and L ₁ regularization. The x-axis is the -log10 (error rate) in the range between 3.3 and 3.7. The y-axis is the empirical discrimination power defined as the largest proportion of bases whose empirical error rate is less than 10^−x. L ₁ 1x, 5x, 50x indicates that the L ₁-regularized model is trained with 1-, 5-, 50-folds of 3 million bases, respectively